Year	Percent of total labor force
1980	7.824
1981	8.29
1982	7.457
1983	7.945
1984	10.503
1985	8.674
1986	8.603
1987	7.126
1988	7.069
1989	5.059
1990	4.225
1991	4.138
1992	3.86
1993	5.127
1994	6.34
1995	7.151
1996	7.251
1997	6.741
1998	4.937
1999	4.381
2000	3.925
2001	4.009
2002	4.995
2003	6.264
2004	6.623
2005	7.582
2006	7.647
2007	7.964
2008	7.552
2009	9.432
2010	10.77
2011	12.677
2012	15.526
2013	16.183
2014	13.894
2015	12.444
2016	11.066
2017	8.867
2018	7.13
2019	6.821
2020	6.3
2021	6.099
2022	6.002
2023	5.902
2024	5.902